Taking the flexible pin of planetary gear train in a megawatt wind turbine gearbox as study object

the principle of load equilibration of flexible pin in the muti-planetry gear transmission is analyzed.By using FEA method

the calculation of deformation and the strength checking of flexible pin and sleeve are carried out.Based on the FEA results

using the fatigue life estimation software MSC.fatigue

the fatigue life of the flexible pin and sleeve is estimated and the process of time history loading setup and material S-N curves definition are explained.All the results show that the flexible pin and the sleeve will be safe in the aspects of strength

but in order to meet the durability requirement

it is essential to make some improvements on the shoulder of fexible pin to reduce the stress concentration.